Eedfflold boeklen



UNITED STATES PATENT OFFICE.

REINHOLI) BOEKLEN, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE OARBURETTED AIR GAS COMPANY, OF SAME PLACE.

FLUID-PRESSURE REGULATOR.

SPECIFICATION formingpart of Letters Patent No. 224,575, dated February 17, 1880. Application filed August 29, 1879.

- To all whom it may concern Be it known that I, REINHOLD BOEKLEN, of the city of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Fluid- Pressure Regulators, of which the following is a specification, Which is accompanied by drawings, forming part thereof, in which Figure 1 represents a vertical central section of the regulator constructed according to my invention. Fig. 2 is a face view of the same, the cap and diaphragm of it being removed to expose the working parts in the regulatingchamber.

This invention rel-ates to' the class of gasregulators in which the pressure of the gas on a diaphragm closes or partially closes the in let as soon as the pressure becomes too great.

The invention consists in having the regulator provided with a regulating-chamber, a diaphragm or expanding disk, a valve over its inlet,and a toggle-joint connection from said diaphragm to said valve for readily looking said valve against undue high pressure toward the inlet, while at the same time being readily opened by undue low pressure within the regulating-chamber.

It consists, also, in the combination of the above parts with a counterbalance-spring attached to said connection, and provided with an adjusting-screw operating from outside of the regulator to adjust the tension of said spring, and thereby adjust the regulator for the requisite pressure.

The letter A indicates the case of the regulator, and B its regulating-chamber; D, its diaphragm, which is attached by means of a cap, E, over the front side of the regulating chamber. In the rear side of said chamber is 0 made the outlet Z, and through the bottom part the inlet-aperture X. The case A and the cap E have each a similar circular flange at their junction, between which the peripheral portion of the diaphragm is clamped and tightly secured by means of screws applied through said flanges. Said diaphragm has a central guide-rod, Y, the ends of which are guided to slide easily in the cap and rear side of the regulator. Said. guide rod passes 50 through the central portion of the diaphragm,

and is provided with a shoulder and washer on theinner side, and with a screw-nut and washer, F, on the opposite or outside of the diaphragm to clamp it between said washers. The central portion of said rod has a right-angular projecting stud, 2, attached, by which the regulating-valve G over the inlet X is operated. Said valve is pivoted to a back plate, Z, secured to the rear side of the regulatingchamber; a

The top of the inlet X is finished flat for a seat for the valve G, which has a leather or rubber plug, h, on its face to make said seat air-tight when pressed upon it, and it has a shank, i, by which it is pivoted to said back plate.

In the top side of the chamber B, over the valve G, is arranged a vertical toggle-lever, H, which is also pivoted to said back plate. The lower end of this lever H has, nearly opposite the stud z of the rod, a pivot, j, which is connected to the stud z by means of a link,

4; and said lever Hhas a stud, 3, not far from its fulcrum,which stud is connected to the valve G by means of the link 5, which is pivoted to. the head of the valve by means of the pivot 10.

The relative positions of the fulcrumof the lever H, the pivot 10, and the stud 3 are arranged to come in line at the time when the valve is tight upon its seat, and consequently the diaphragm at its most expanded position, so that as soon as the diaphragm retracts from said position the stud 3 moves from said line toward the rear side of the chamber. To cause this movement of retracting of the dia- 8 5 phragm with promptness, I employ a spiral spring, 6, on the hub or arbor 2, in case of being secured and formingpart of the lever, by means of the arm 7, to which the top end of the spring is attached. To regulate the tension of said spring, I attach to its bottom end a sliding adjustingscrew, 8, which is passed through an opening for it in the case A, to project on the outside, for operating the same while the instrument is closed and in operation. Said adjusting-screw has a screw-thread on its exterior end, to which the screw-nut 15 is properly fitted.

To prevent leakage around said adjustingsorew in the case, a stuffing-box, 11, is provided 9, with an eye against which the screw-nut 15 bears, as shown, so that by turning the nut 15 either in one or the other direction the tension of the spring is varied. I use a spring in this connection because weights are unsuitable for use in cars, owing to the continual shaking,

which would cause a continual flickering of i the light.

The parts attached to the back plate, Z, may be attached to the rear side of the chamber and said plate dispensed with; but said plate is preferred, in order to facilitate the manufacture.

The object of arranging the stud 3 so as to form the toggle-joint, with the pivot 10 and the fulcrum of the lever H at the closed position of the valve, is to prevent a heavy pressure against the valve G from forcing open this valve and superseding the action of the valve connection with the diaphragm and causing the bursting of said diaphragm.

As it will be seen, when said stud 3 is in line, as above stated, and the lin 5 sufficiently strong, such surplus pressure is inadequate to open the valve, while at the same time this valve is readily opened as soon. as the pressure in the chamber is below its demand by the spring 6.

By having the guide-rod Y guided to slide with both ends in guides its motion is free and not liable to clog or bind, and in consequence the diaphragm controls the valve and lever sys tem connecting the diaphragm with the valve with ease and freedom, so as to regulate the pressure in the regulatin g-chamber with proper precision for gas-illumination.

What I claim is- 1. In a pressure-regulator, a diaphragm and rod, guided at both ends and connected to a positively-moved valve by a system of levers, the axes of said levers being brought into the same plane as the "alveis closed, substantially as and for the purpose herein set forth.

2. In a pressureregulator, the combination of a diaphragm with arod guided at both ends and connected with a valve by the levers 4, H, and 5, substantially as herein described, and for the purpose set forth.

8. In a pressure-regulator, the combination of a diaphragm with a system of levers and a valve, a spring'connected to said levers, and a rod for adjusting the tension of the same, substantially as and for the purpose herein shown and described.

' REINHOLD BOEKLEN.

Witnesses J. P. TI-I. LANG, D. O. LAWRENCE. 

